[puffybuf]

I should point out getting bitcoin anonymously requires some work too (if you buy BTC it is tied to your CC, and many exchanges require your ssn). Mullvad does allow you to send them cash anonymously in the mail as well.

[Tiberium]

Mullvad also allows you to pay in Monero which by itself is still considered anonymous, no one broke it (yet?).

[Zambyte]

The most anonymous way to purchase a Mullvad subscription is ironically buying a card from Amazon

https://www.amazon.com/Mullvad-VPN-Windows-Android-SCRATCH/d...

Edit: I realized they accept Monero. That is probably about equally anonymous.

[ylk]

You can also mail them cash